Development of a Linker with an Enhanced Stability for the Preparation of Peptide Thioesters and Its Application to the Synthesis of a Stable-Isotope-Labelled HU-Type DNA-Binding Protein
Polypeptide Synthesis Using theS-Alkyl Thioester of a Partially Protected Peptide Segment. Synthesis of the DNA-Binding Domain ofc-Myb Protein (142–193)–NH2
Aryl thioesters of peptide segments were prepared by the conventional 9-fluorenylmethoxycarbonyl (Fmoc) strategy using a novel N-alkyl cysteine (NAC)-assisted thioesterification reaction. The peptide carrying NAC at its C-terminus was prepared by the Fmoc strategy and converted to the aryl thioester by 4-mercaptophenylacetic acid (MPAA) treatment without significant side reactions. The peptide thioester was used for the efficient preparation of 95-amino acid (AA) chemokine CCL27 by an Ag+-free thioester method.
Synthesis of Peptide Thioacids at Neutral pH Using Bis(2-sulfanylethyl)amido Peptide Precursors
作者:Silvain L. Pira、Emmanuelle Boll、Oleg Melnyk
DOI:10.1021/ol402601j
日期:2013.10.18
Reaction of bis(2-sulfanylethyl)amido (SEA) peptides with trilsopropylsilylthiol in water at neutral pH yields peptide thiocarboxylates. An alkylthioester derived from beta-alanine was used to trap the released bis(2-sulfanylethyl)amine and displace the equilibrium toward the peptide thiocarboxylate.